240906721 has 8 divisors (see below), whose sum is σ = 263340000. Its totient is φ = 218562240.

The previous prime is 240906709. The next prime is 240906727. The reversal of 240906721 is 127609042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240906721 - 2¹¹ = 240904673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240906727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16456 + ... + 27433.

It is an arithmetic number, because the mean of its divisors is an integer number (32917500).

Almost surely, 2^240906721 is an apocalyptic number.

It is an amenable number.

240906721 is a deficient number, since it is larger than the sum of its proper divisors (22433279).

240906721 is a wasteful number, since it uses less digits than its factorization.

240906721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44399.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 240906721 is about 15521.1700912012. The cubic root of 240906721 is about 622.2281268442.

The spelling of 240906721 in words is "two hundred forty million, nine hundred six thousand, seven hundred twenty-one".